21431304213133 has 8 divisors (see below), whose sum is σ = 21786451577856. Its totient is φ = 21076279897200.

The previous prime is 21431304213091. The next prime is 21431304213197. The reversal of 21431304213133 is 33131240313412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21431304213133 - 2³³ = 21422714278541 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21431304213095 and 21431304213104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21431304513133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30410941 + ... + 31107682.

It is an arithmetic number, because the mean of its divisors is an integer number (2723306447232).

Almost surely, 2^{21431304213133} is an apocalyptic number.

It is an amenable number.

21431304213133 is a deficient number, since it is larger than the sum of its proper divisors (355147364723).

21431304213133 is an equidigital number, since it uses as much as digits as its factorization.

21431304213133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61524395.

The product of its (nonzero) digits is 15552, while the sum is 31.

Adding to 21431304213133 its reverse (33131240313412), we get a palindrome (54562544526545).

The spelling of 21431304213133 in words is "twenty-one trillion, four hundred thirty-one billion, three hundred four million, two hundred thirteen thousand, one hundred thirty-three".